:root {
    --bg: #050713;
    --bg-soft: #0b1024;
    --panel: rgba(15, 24, 55, 0.72);
    --panel-strong: rgba(21, 32, 74, 0.92);
    --line: rgba(124, 198, 255, 0.22);
    --text: #f3f7ff;
    --muted: #aab8d8;
    --blue: #4dc9ff;
    --cyan: #55ffe6;
    --purple: #9967ff;
    --pink: #ff5bc8;
    --radius: 24px;
    --shadow: 0 24px 80px rgba(11, 35, 95, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 5%, rgba(77, 201, 255, 0.18), transparent 25%),
        radial-gradient(circle at 88% 10%, rgba(153, 103, 255, 0.20), transparent 26%),
        linear-gradient(180deg, #040510 0%, #070b1b 45%, #03040b 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,.75), transparent 78%);
    z-index: -1;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { color: var(--muted); line-height: 1.8; }

.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: blur(18px);
    background: rgba(5, 7, 19, 0.72);
    border-bottom: 1px solid rgba(124, 198, 255, 0.16);
}
.nav-shell { display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .5px; }
.brand-mark {
    width: 44px; height: 44px; display: grid; place-items: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--pink), var(--purple) 52%, var(--blue));
    box-shadow: 0 0 34px rgba(77,201,255,.42);
    color: #fff;
    font-size: 14px;
}
.brand-text { font-size: 20px; }
.brand.compact .brand-mark { width: 38px; height: 38px; border-radius: 14px; }

.site-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a {
    color: #dce8ff;
    padding: 11px 14px;
    border-radius: 999px;
    font-size: 15px;
    transition: .24s ease;
}
.site-nav a:hover, .site-nav a.active {
    color: #fff;
    background: rgba(77, 201, 255, 0.12);
    box-shadow: inset 0 0 0 1px rgba(77, 201, 255, 0.24);
}
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: rgba(255,255,255,.06); border-radius: 14px; }
.nav-toggle span { display: block; width: 20px; height: 2px; margin: 5px auto; background: #fff; border-radius: 2px; }

.hero { padding: 94px 0 70px; position: relative; }
.hero::after {
    content: ""; position: absolute; inset: 12% -15% auto auto; width: 360px; height: 360px;
    background: radial-gradient(circle, rgba(85,255,230,.24), transparent 66%); filter: blur(8px); z-index: -1;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.eyebrow {
    display: inline-flex; align-items: center; gap: 10px; padding: 8px 14px;
    border: 1px solid rgba(85,255,230,.24); border-radius: 999px;
    color: #b9fff5; background: rgba(85,255,230,.07); font-size: 14px;
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 16px var(--cyan); }
h1, h2, h3 { color: var(--text); line-height: 1.18; margin: 0; }
h1 { margin-top: 22px; font-size: clamp(42px, 7vw, 76px); letter-spacing: -2.5px; }
.hero h1 span, .gradient-text {
    background: linear-gradient(100deg, #fff, #7de8ff 35%, #b390ff 70%, #ff9dde);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: 18px; margin: 24px 0 0; max-width: 720px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 10px;
    min-height: 48px; padding: 0 22px; border-radius: 999px;
    border: 1px solid rgba(255,255,255,.18); color: #fff; transition: .24s ease;
}
.btn.primary { background: linear-gradient(135deg, var(--blue), var(--purple)); border-color: transparent; box-shadow: 0 12px 35px rgba(77,201,255,.24); }
.btn:hover { transform: translateY(-2px); box-shadow: 0 18px 48px rgba(77,201,255,.24); }
.hero-card, .panel {
    background: linear-gradient(180deg, rgba(18, 27, 62, .86), rgba(10, 15, 35, .72));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.hero-card img { width: 100%; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px; }
.stat { padding: 16px; border: 1px solid rgba(124,198,255,.18); border-radius: 18px; background: rgba(255,255,255,.04); }
.stat strong { display: block; font-size: 28px; color: #fff; }
.stat span { color: var(--muted); font-size: 13px; }

.section { padding: 78px 0; }
.section.tight { padding-top: 34px; }
.section-head { display: flex; justify-content: space-between; gap: 28px; align-items: flex-end; margin-bottom: 34px; }
.section-head .copy { max-width: 720px; }
.kicker { color: var(--cyan); font-weight: 700; letter-spacing: .08em; font-size: 13px; margin-bottom: 12px; }
.section h2 { font-size: clamp(30px, 4vw, 48px); letter-spacing: -1.2px; }
.section-head p { margin: 14px 0 0; }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card, .feature-card {
    position: relative; overflow: hidden;
    padding: 26px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid rgba(124,198,255,.18);
    box-shadow: 0 14px 44px rgba(0,0,0,.18);
}
.card::before, .feature-card::before {
    content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 18% 0%, rgba(77,201,255,.17), transparent 38%); pointer-events: none;
}
.card > *, .feature-card > * { position: relative; }
.card .icon {
    width: 52px; height: 52px; border-radius: 18px;
    display: grid; place-items: center; margin-bottom: 18px;
    background: rgba(77,201,255,.12); color: #8deaff; font-weight: 800;
    border: 1px solid rgba(77,201,255,.24);
}
.card h3, .feature-card h3 { font-size: 21px; margin-bottom: 10px; }
.card p, .feature-card p { margin: 0; }

.split { display: grid; grid-template-columns: .92fr 1.08fr; gap: 32px; align-items: center; }
.split.reverse { grid-template-columns: 1.08fr .92fr; }
.visual-panel { padding: 18px; }
.visual-panel img { border-radius: 18px; width: 100%; }
.list { display: grid; gap: 14px; margin-top: 24px; }
.list li {
    list-style: none; padding: 16px 18px; border-radius: 18px;
    background: rgba(255,255,255,.045); border: 1px solid rgba(124,198,255,.14);
    color: #dce8ff; line-height: 1.7;
}
.list li strong { color: #fff; }

.matrix { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.metric {
    border-radius: 22px; padding: 22px; min-height: 160px;
    background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.025));
    border: 1px solid rgba(124,198,255,.16);
}
.metric b { font-size: 13px; color: var(--cyan); letter-spacing: .08em; }
.metric strong { display: block; margin-top: 18px; font-size: 32px; }
.metric span { color: var(--muted); font-size: 14px; }

.scenario-grid, .video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.scenario, .video-card {
    overflow: hidden; border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid rgba(124,198,255,.18);
}
.scenario img, .video-card img { width: 100%; }
.scenario .body, .video-card .body { padding: 24px; }
.tag-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.tag { padding: 7px 11px; border-radius: 999px; color: #c9faff; background: rgba(85,255,230,.08); border: 1px solid rgba(85,255,230,.18); font-size: 13px; }

.timeline { position: relative; display: grid; gap: 18px; }
.step { display: grid; grid-template-columns: 62px 1fr; gap: 18px; align-items: start; }
.step-num { width: 52px; height: 52px; border-radius: 18px; display: grid; place-items: center; background: linear-gradient(135deg, var(--blue), var(--purple)); font-weight: 800; box-shadow: 0 0 28px rgba(77,201,255,.32); }
.step-body { padding: 22px; border-radius: 22px; border: 1px solid rgba(124,198,255,.16); background: rgba(255,255,255,.045); }
.step-body h3 { margin-bottom: 8px; }
.step-body p { margin: 0; }

.faq { display: grid; gap: 14px; }
details {
    border: 1px solid rgba(124,198,255,.18);
    background: rgba(255,255,255,.045);
    border-radius: 18px;
    padding: 18px 20px;
}
summary { cursor: pointer; font-weight: 700; color: #fff; }
details p { margin: 12px 0 0; }

.page-hero { padding: 74px 0 40px; }
.page-hero h1 { font-size: clamp(38px, 6vw, 64px); max-width: 900px; }
.page-hero p { max-width: 780px; font-size: 18px; }
.breadcrumb { display: flex; gap: 10px; color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.breadcrumb a { color: #c9faff; }

.contact-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.form-box { display: grid; gap: 14px; }
.form-box label { display: grid; gap: 8px; color: #e8f2ff; }
.form-box input, .form-box textarea, .form-box select {
    width: 100%; border: 1px solid rgba(124,198,255,.22); border-radius: 16px;
    background: rgba(5, 8, 20, .72); color: #fff; padding: 14px 15px; font: inherit;
}
.form-box textarea { min-height: 140px; resize: vertical; }
.notice { padding: 18px; border-radius: 18px; background: rgba(85,255,230,.08); border: 1px solid rgba(85,255,230,.2); color: #dffef9; }

.site-footer { margin-top: 60px; background: rgba(3, 5, 13, .88); border-top: 1px solid rgba(124,198,255,.16); }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 34px; padding: 48px 0; }
.footer-grid h2 { font-size: 18px; margin-bottom: 14px; }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; color: var(--muted); }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(124,198,255,.12); padding: 16px 0; color: var(--muted); font-size: 14px; }
.domain-line span { color: #c9faff; }

.reveal { opacity: 0; transform: translateY(18px); transition: .65s ease; }
.reveal.show { opacity: 1; transform: none; }

@media (max-width: 980px) {
    .hero-grid, .split, .split.reverse, .contact-panel { grid-template-columns: 1fr; }
    .card-grid, .matrix { grid-template-columns: repeat(2, 1fr); }
    .section-head { display: block; }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    .container { width: min(100% - 28px, 1180px); }
    .nav-toggle { display: block; }
    .site-nav {
        position: absolute; left: 14px; right: 14px; top: 70px;
        display: none; grid-template-columns: repeat(2, 1fr); gap: 8px;
        padding: 14px; border-radius: 22px; background: rgba(7, 12, 30, .96);
        border: 1px solid rgba(124,198,255,.18);
    }
    .site-nav.open { display: grid; }
    .hero { padding-top: 58px; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; }
    .stats-row, .card-grid, .matrix, .scenario-grid, .video-grid { grid-template-columns: 1fr; }
    .step { grid-template-columns: 1fr; }
    h1 { letter-spacing: -1.3px; }
}

.cta-panel { padding: 32px; }
.no-margin { margin-bottom: 0; }